Volume 11, Number 4—April 2005
Dispatch
Coxiella burnetii in Bulk Tank Milk Samples, United States
Sung Guk Kim*
, Eun Hee Kim* , Caroline J. Lafferty*, and Edward Dubovi*
, Eun Hee Kim* , Caroline J. Lafferty*, and Edward Dubovi*
Table 2
Q fever infection rate of specific cows in a bulk tank–positive dairy herd based on Coxiella burnetii shedding in their milk over 3 years (2002–2004)
| Month/year collected | No. of samples | Positive (%) | Negative (%) |
|---|---|---|---|
| Jul 2002 | 53 | 28 (52.8) | 25 (52.8) |
| Aug 2002 | 53 | 28 (52.8) | 25 (52.8) |
| Sep 2003 | 51 | 16 (31.3) | 35 (68.6) |
| Dec 2003 | 48 | 14 (29.2) | 34 (70.8) |
| Feb 2004 | 52 | 13 (25.0) | 39 (75.0) |
| Jul 2004 | 34 | 8 (23.5) | 26 (76.5) |
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